Blow-off valve.



No. 694,773. Pate ntad Mar. 4, 1902'.

W. L. MORRIS.

BLOW-OFF VALVE. 7

(Application filed Aug. 23, 1897. Eenawed 0c? 27, 1899.)

(No Model.)

proper.

UNITED STATES PATENT OFFICE.

VVILLIAM L. MORRIS, OF CLEVELAND, OHIO.

BLOW- O FF VALVE.

SPECIFICATION forming part of Letters Patent No. 694,773, dated March 4, 1902. Application filed August 23, 1897. Renewed October 27, 1899. fierial No. 734,983. (No model.)

To all whom/it may concern:

Be it known that I, WILLIAM L. Mounts, a citizen of the United States, residing at Cleve land, in the county of Ouyahoga and State of Ohio, have invented certain new and useful- Improvements in Blow-Off V alves, of-Which the following, with the accompanyingdrawings, is a specification; Q

This invention relates to certain new and useful improvements. in valves of the class commonly termed blow-off, angle, and globe valves.

The object of the invention is to reduce the wear of the valve-seating faces and to provide economical and ready means for repair.

The invention consists in the novel features of construction and in the various combinations of the parts, all as more fully hereinaf-' tcr described, and pointed out in the claims.

In the accompanying drawings, which form a part of this specification, Figure 1 is aside elevation of myimproved valve with the shell partially broken away and showing the valve closed. Fig. 2 is a central vertical section at right angles toFig. 1, but with valve open. Fig. 3 is ahorizontal section on line :rccof Fig. 1. Fig. 4: is an inverse horizontal section on the line y yof Fig.1. Fig. 5 is a top plan of one of the .recessed lugs formed onthevalve case or body. r p

1 represents the valve body or case, provided with thefianged openings 2 at right angles to each other as means for connectingvalve to pipe, or such openings may be thread-1 ed, if preferred. v

3 represents the cap. In'the upper face of this cap and upon opposite sides there are formed dovetail or undercut recesses 4., adapted to receive the heads of the bolts 5, the upper ends of which pass through the flange of the gland 6 and receive the nuts 7, said gland and cap forming a stuffing-box through which 'the valve-stem 8 passes.

9 is the valveseat ring, audit is shown as screwed into a threaded'bearing providedin the body 1. This valve-seat may be formed integrally with the valve-bod y or be tapered and driven into place.

10 represents the plug portion of the valve It is provided with a piston portion 11, which slidingly engages the valve-seat ring 9. At the upper terminal of this piston portion there is formed an annular shoulder to receive the valve-ring 12, which may be flat upon the valve-seat or have an angular bearing on outer periphery of valve-ring or on the inner peripheryof valve-ring,as shown. Ordinarily'tliis. valve-ring 12 would be made of some suitable soft'in'etal, such as Babbitt.

' The upper end of the plug 10 is somewhat reduced and threaded to receive the cap-nut 13, which screws down upon and retains the valve-ring 12 in place, while it also retains the headed lower end of the valve-stem 8 in the recessed upper end of the plug 10, as shown.

.At the lower end of the piston portion there are formed the guide-wings 1-1, which do not pass out of the valve-ring 9 when valve is opened, therebyinsuring the entrance of the piston as'the valve is closed.

Rising from the piece?) is the yoke 15, and it is provided with the diametrically opposite arms 16, arranged to come coincident with slotted recessed lugs 17, formed in the case or body 1.

18. are the bolts for securing the cap-piece 3'in. place, the heads of the bolts engaging the slotted lugs 17 while their upper ends slip into slots 19, formed in the arms 16, and

receive the nutsEQ, by means of which the cap body are firmly secured together.

21 represents the stationary valve-stem nut throughwhich the valve-stem 8 is threaded.

This stem-nut 21 slips into an axial opening or hole in the head of the yoke 15 and is prevented from turning therein by the flanged head 22,while its upper ends receives a threaded collar 23, which retains the stem-nut in proper place. I 1

24: is a hand-wheel, secured upon the outer end of the valve-stem 8.

The parts being constructed and arranged substantially in the manner herein described, the operation is as followspresuming t valve to be closed as shown in Fig. 1. As valve proper is raised from its seat, the piston portion is within the valve-seat ring and obstructs the flow, thereby decreasing wear of valve and seat. When piston portion has been sufficiently opened to allow free passage, the valve is protected from the current. -When the valve is being closed, the piston portion is guided by the wings positively to the valve-ring seat, closes flow, and holds back any coarse matter, such as scale, and allows only a fine stream to play upon the valve, Which when it seats itself is thoroughly washed of any particles which would deface the valve or seat were it to come between them when closed.

The accessibility to the various parts, and the manner the parts are assembled is so very apparent it is not deemed necessary to enlarge thereupon.

What I claim as my invention is 1. The combination with a valve-seat, of a valve comprising a valve-plug provided with a male thread, apiston portion, and an angular circumferential recess intermediate of said thread and piston portion; a seatingring of angular cross=seetion in said recess, and a cap-nut engaging said thread for securing said ring in said recess, substantially as set forth.

2. In a valve of the character described, a valve-plug carrying a valve-ring, a headed valve-stem engaging a recess in the head of said plug, and a cap-nut for securing and retaining said valve-ring and valve-stem in and upon said plug, in the manner and for the purpose, substantially as set forth.

3. In combination, a valve-case provided with a valve-seat ring 9, a plug carrying a valve-ring 12, a piston portion 11, guide-Wings 14, a headed valve-stem 8, and a retaining cap-nut 13, substantially as and for the purpose specified.

4. In a'device of the character described, in combination, a valve consisting of a body portion carrying a removable valve-ring, a headed valve-stem secured between the said body portion and a retaining-cap, said cap being adapted to secure said valve-ring in position, substantially as and for the purpose set forth.

In testimonyWhereof I affix my signature, in presence of two witnesses, this 5th day of June, 18

WM. L. MORRIS. Witnesses:

H. S. SPRAGUE, H. P. BAILEY. 

